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CVE-2020-16119

DCCP CCID structure use-after-free

HIGH
7.8
CVSS Score
Published: January 14, 2021 at 01:10 AM UTC
Updated: June 17, 2026 at 02:57 AM UTC
3 products affected across 3 vendorsLinux KernelDebian LinuxUbuntu Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%

Description

Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
12.0414.0416.0418.0420.04
Debian Linux· Debiandrupal
95%
11.09.0
Linux Kernel· Linux
95%
3.13 kernel ≤ v < 3.13.0.182.1913.2 kernel ≤ v < 3.2.0-149.1964.15 kernel ≤ v < 4.15.0-121.1234.4 kernel ≤ v < 4.4.0-193.2245.3 kernel ≤ v < 5.3.0-68.635.4 kernel ≤ v < 5.4.0-51.563.13 kernel3.2 kernel4.15 kernel4.4 kernel5.3 kernel5.4 kernel
Affected range stops below 3.13.0.182.191, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.0-149.196, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.15.0-121.123, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.0-193.224, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.3.0-68.63, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.0-51.56, so it looks safe — our inference, not a vendor statement

References (12)

Vendor Advisoryx_refsource_UBUNTUPatchThird Party Advisory
Source: [email protected]
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695
Vendor Advisoryx_refsource_UBUNTUIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://launchpad.net/bugs/1883840
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
x_refsource_CONFIRM
Source: [email protected]
https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210304-0006/
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://ubuntu.com/USN-4576-1
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://ubuntu.com/USN-4577-1

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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